For other uses of Opossum, see Opossum (disambiguation). The opossums, also known as possums, are marsupial mammals of the order Didelphimorphia /daÉªËdÉlfáµ»ËmÉËrfiÉ/). The largest order of marsupials in the Western Hemisphere, it comprises 103 or more species in 19 genera.
The index also provides statistical analysis and crime, and the cost of crime, in the 61 most populous metropolitan areas. The Cambridge metro area in Massachusetts ranked as the most peaceful and the Detroit metro area as the least. Murders in the United States by state.
Alaska was the nation's most dangerous state in 2013 and the only state with more than 600 violent crimes per 100,000 residents. Incidents of murder and nonnegligent manslaughter and rape both rose nearly 10% in 2013 from 2012, despite falling across the country last year.